regular expression – Get specific values ​​from the string in VBA Excel

A trading software called Rotman Interactive Trader expresses in Excel crude oil supply messages, the so-called strings, which more or less follow this format:

WEEK 3 CL CURRENT CONSTRUCTION 12 MLB BBLS VS FORECAST CONSTRUCTION 4 MLN BBLS

I basically want to grab the 12 and the 4 and subtract them (12-4 = 8). However, it is also possible that the news:

WEEK 3 CL ACTUAL BUILD 12 MLB BBLS VS FORECAST TO DRAW 4 MLN BBLS

In this example, my calculation would be (12 + 4 = 16). It is also possible that the first BUILD is a DRAW.

Ideally I would like to code a function that returns this array or the like according to the first example.

[0][0]    = BUILD
[0][1]    = 14
[1][0]    = BUILD
[1][1]    = 4

Unfortunately, I am not fluent in VBA Excel and would like some help or ideas on how to achieve this. All help is appreciated. Many Thanks!